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Патент USA US2116704

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May 10, 1938.
G. LAUBE ET AL
.
LENS
2,116,704
MOUNT
Filed sept. 2e, 193e
__.
Fig. 7.
f I
INVENTORS
44
Fig. 5.
Fig. 6.
Grover Laube
BY
Charles M. Miller
y# ¿03W ATTORNEY
Patented May 10, 1938
2,116,704
UNITED STATI-:s PATENT -ol-‘Flclz
2,116,704 «
LENS MOUNT
Grover Laube and charles Melvin’MillerQLos
Angeles, Calif., assignors to Twentieth Cen
tury-Fox Film Corporation, Los Angeles, Calif.,
a corporation of New
York -
IApplication September 26,1936, Serial No. 102,715 u
7 Claims.
(ci. sii-_24)
The ring I5 is held in place by another ring Il
'I'his invention relates to lens mounts and
deals with a mount for objective lenses wherein
screw threadedly mounted thereon by screw
threads I9 and carries internal threads 20 adapt
-ed to receive the conventional screw threaded
The principal object of this invention is to end of the lens L. In cases where adjustment is
CFI
provide a lens mount having means for focusing needed for initial mounting of the lens L, a. shim
an objective lens, wherein the objective is moved of the required thickness may be used between
on its principal axis in a rectilinear non-rotating the shoulders I6 and I'II
'I'he means for moving the lens carrying sleeve
movement.
I2 and focusing the lens L is designated A in its
Another object is to provide a lens mount hav
‘novel means is incorporated for focusing the
lens.
ing anti-friction bearings for . supporting the . entirety.
As before stated, it is one of the objects
of this invention to provide means for this pur
pose that moves the lens in a non-rotating recti
linear movement. As shown, this consists of a
bracket 22 mounted on the sleeve II by screws 23
and 24. The bracket 22 is formed with a hub 25
adapted to receive a rotatable shaft 26. On
the inner end of the shaft 26 we provide an annu
lar shoulder 21 that is arranged to bear against
movement of the lens.
A further object is to provide a novel means
for moving ' the objective.
Still another object is to provide a lens mount
wherein the over-al1 movement of the'operating
means for focusing may be standardized for
lenses of different focal lengths.
Aistill further object is to provide a lens mount
20
a recess c_ut in the bracket 22.
characterized by precision and durability.
-The inner face 20
of the shaft 26 carries an eccentric pin 28. On
the pin 26 we pivotally mounta block 29. For
And another object is to provide a lens mount
of the character described thatlends itself read
ily to ease and economy in manufacturing.
Otherl objects and advantages will appear as
the description proceeds in conjunction with the
2 GI drawing in which:
purposes of assembling this arrangement, the
supporting sleeve I I is formed with an opening 30
large enough to receive the inner end of the .
shaft 26 and pass the pin 28 and the block 29. 25
When assembled, the block 29 fits into a circum- _
‘ Figure 1 is a view of our mount construction
shown partly in elevation and partly in section. `ferential slot 3| in the sleeve I2. By referring
Figure 2 is a side elevation of the mount taken to Figure 3, it can be seen that rotation of the
shaft 26 will force the sleeve I2 >to travel longi
30 in the direction of the arrow in Figure 1.
Figure 3 is a View similar to Figure 2 with the tudinally in the sleeve Il. The means for turn
operating knob removed and is taken on line ing the shaft 26 comprises a knob 32 attached to
the shaft by a screw 33. Any suitable means for
3-3 of AFigure 4.
_
preventing slippage of the knob on the shaft may
Figure 4 is a cross section taken on line 4--4 of
Figure 2.
'
1
Figure 5 is a cross sectional view showing the
arrangement of the anti-friction bearing for sup
porting the objective lens.
Figure 6 is a longitudinal section of the same,
40 and
Figure 7 is a crossrsectional> view showing
an'other form of the anti-friction bearing.V
Referring to the drawing and particularly to
Figure 1, it will be observed that lour invention
comprises a supporting sleeve II, having an ob
jective carrying sleeve I2 movably mounted
therein. The supporting sleeve II is adapted to
be `mounted on a conventional motion picture
camera, not shown, and for this purpose is pro
50 vided with a turnable ring I3 arranged to detach-.
ably engage a member I4 mounted on the camera.
This will be recognized as the common means of
mounting a lens on a camera and will not be -
further described. The objective carrying sleeve
I2 is equipped for carrying a lens L in a manner>
to allow initial setting of the lens for the focal
starting point and as shown, comprises -an annu
lar ring
V60
I5 having an outwardly extending
shoulder 4IIì arranged to engage an inwardly ex
tending shoulder I1 on the Supporting sleeve I2. ’
be provided, in this instance we have shown the _u Si
outer end of the shaft 26 turned down and ñat- '
ted on two sides as illustrated and designated 34
in Figure 2.
The knob 32 carries a pointer 35 ` ' '
vwhich may ybe read against the calibrations 36
for indicating the field distances. Means is pro
vided for slight variation in the setting of the
pointer to allow‘for adjustment of the pointer
to the- initial calibration. This feature has been
incorporated in the means for attaching the
pointer to the knob and is best illustrated in Fig
ure 4. Here it canbe seen that the pointer 35
is held against the under side of the knob 32 by
a ring 3l which in turn is clamped against the
pointer body by screws 38. . It is to be under
stood that the pointer 35 is held between the ring â
31 and the knob 32 by friction only 4and that
where the screws 38 pass through the body of
the pointer, the holes are elongated as shown and
designated 39 in Figure 2. This arrangement
allows slight rotation of the pointer with respect
to the knob by loosening the screws 38 and per
mits the pointer to be- adjusted to the knob for the
initial setting of the lens with respect tothe cali
brations.-
>
Another feature of this invention resides in the 60
2
2,116,704
anti-friction bearing for the lens carrying sleeve
tudinally with respect to said supporting sleeve, to
in the supporting sleeve. In Figures l, 5, and 6
we have illustrated this type of bearing. Refer
ring to Figure 1 in the broken away portion, the
rotation of said sleeves.
lens carrying sleeve I2 is supported in the support
ing sleeve I I by means of balls 4I] and 4I riding in
slots or grooves 42 and 43 respectively in the sleeve
I2. `It is obvious that the grooves may be formed
40
45
'
`
lens.
-
3. A lens mount comprising:
a supporting
sleeve; a lens carrying sleeve having a circum
By making these balls and grooves a nice fit, the
lens carrying sleeve may be precisely mounted in
the supporting sleeve and moved with a minimum
ferential slot therein mounted in said supporting
sleeve for longitudinal movement; a block slidably
of friction.
supporting sleeve; a shaft rotatably mounted in
said bracket; an eccentric on said shaft pivotally
connected to said block; means for turning said
shaft to move said lens carrying sleeve longitudi
In practice, we use three or more of
mounted in said slot; a bracket mounted on said
larged views of the ball bearing arrangements and
nally with respect to said supporting sleeve to
may be considered as an enlarged view of the ball
40. In order to prevent binding or excessive fric
focus said lens; means for preventing relative ro
tation of said sleeves; a pointer associated with
tion at the end vof the run of the ball, We recom
mend a post 44 be installed as shown in Figures 5
and 6. This type of bearing will not prevent ro
the means for turning the shaft for indicating the -
focus of the lens, and means for adjusting the
pointer relative to the turning means for the
tation of the sleeve I2 in the sleeve II, 1conse
initial focus of the lens.
quently we provide a key 45 ñxed to the sleeve I2
4. A lens mount comprising: a supporting
by a screw 46 or in any other suitable manner and
sleeve; a lens carrying sleeve having a circum
slot the sleeve I I as shown at 4l to receive the key. . ferential slot in the wall thereof slidably mounted
The key and slot may be reversed in the sleeves if within said supporting sleeve; means for holding
found to be desirable. With this arrangement, said sleeves against relative rotation; a block
the sleeve I2 may be moved longitudinally in the
mounted in said slot and adapted to be recipro
sleeve II with nice precision and a minimum of cated therein ;" a. turnable member mounted upon 30
said supporting sleeve, and means for pivotally
The aperture control means comprises a sleeve
connecting said block to an eccentric position on
>50 rotatably mounted in the sleeve I2. The inner said turnable member.
end of the sleeve 50 carries a tongue 5I adapted
5. A lens mount comprising: a supporting
to engage a slot on the periphery of the lens shell.
sleeve;' a lens carrying sleeve telescopically mount
It is to be understood that the sleeve 50 travels ed within said supporting sleeve, said lens carry
with the sleeve I2 and is rotatably held in the ing sleeve having a straight sided vertical slot in «
sleeve I2 by means of a screw 52 screw threadedly
the Wall thereof; means for preventing relative
mounted in the sleeve I2 and having a tongue 53
rotation of said sleeves; a block mounted in said
extending into a groove 54 in the sleeve 50. An
slot and adapted to be vertically reciprocated
opening 52’ is provided in the sleeve I I for insert
therein; a rotatable member mounted upon said
ing the screw 52. The outer end of the sleeve 50 supporting sleeve, and a pin pivotally connecting
is bell shaped for purposes of admitting light. said block to an eccentric position upon said ro
The indicia 55 for indicating the aperture is car'
tatable member.
ried on a flange 56 that extends inwardly over the
6. A lens mount comprising: a supporting Y.
outer periphery of the sleeve II and may be read sleeve; a lens carrying sleeve slidably mounted
friction.
Li
'
2. The elements of claim l and in addition
thereto, a pointer associated with said means for
turning the shaft for indicating the focus of said
in either sleeve if more convenient or desirable.
these ball arrangements at each end of the sleeve,
circumferentially spaced around the sleeve I2 as
shown in Figure 4. Figures 5 and 6 show en
‘
focus said lens and means for preventing relative
»
.
against a mark 5l on the sleeve I I.
In Figure 7 we have shown another form of
within said supporting sleeve, said lens carrying
ball bearing for mounting the lens carrying sleeve
substantially transversely to the longitudinal axis
of said sleeve; a block slidably mounted within
said slot for reciprocal movement therein; a vmem
ber rotatably mounted upon said supporting
sleeve, said member having its axis of rotation
substantially perpendicular to the longitudinal
in the supporting sleeve. In this form we incor
porate the means for holding the travelling sleeve
against rotation with respect to the supporting
sleeve as well as providing an anti-friction bear
ing for the sleeve. The bearing comprises a ball
60 which works in longitudinal slots 6I and 62 in
the supporting sleeve II and the lens carrying
sleeve I2 respectively. A bearing of this nature
will hold the two sleeves against relative rotation
and will at the same time furnish an anti-friction
support for one sleeve within the other. Our in
vention includes a bearing of this type.
Having set forth the objects and advantages of
our invention together with a description of the
same, what we claim is:
l. A lens mount comprising: a supporting
sleeve; a lens carrying sleeve having a circum
ferential slot therein mounted in said supporting
sleeve for longitudinal movement; a block slidably
mounted in said slot; a bracket mounted on said
supporting sleeve; a shaft rotatably mounted in
said bracket; an eccentric on saidshaft pivotally
connected to said block; means for turning said
shaft to move said lens carrying sleeve longi
sleeve having a slot in the wall thereof extending
Si)
axis of said sleeve, and means for pivotally con- .
necting an eccentric position on said member to
said block.
.
'7. A lens mount comprising:
,
a supporting
sleeve adapted to be mounted upon a camera or
the like; a lens carrying sleeve having a circum (il)
ferential slot therein slidably mounted within.
said supporting sleeve; means for confining the
movement of the said lens carrying sleeve to a
longitudinal movement within said supporting
sleeve; a turnable member mounted upon said
supporting sleeve and extending through saidsleeve for operative connection with said lens
carrying sleeve; a block slidably mounted within
said slot for reciprocal movement, and a pin piv
otally connecting said block to an eccentric posi
tion upon said turnable member.
'
GROVER LAUBE.
CHARLES MELVIN MILLER.
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